William millard



W. MILLARD. ADJUSTABLE BASE POB, GROWING sAWs.

No.. 429,142. Patented June 3, 1890.

llas!! l llnilimlxll UNITED STATES PATENT OFFICE.

IVILLIAM MILLARD, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE E. C.

ATKINS do COMPANY, OF SAME PLACE.

ADJUSTABLE BASE FOR GROOVlNG-SAWS.

SPECIFICATION forming part 0f Letters Paterll':J No. 429,142, elated June 3, 1890.

Application filed November 4, 1889. Serial No. 329,121. (No model.)

To all whom it may concern.

Be it known that l, WILLIAM MILLARD, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvemen ts in Adjustable Bases for Grooving-Saws, of which the following is a specification.

The obj ect of my said invention is to provide a simple means for supporting grooving-saws, dado-cutters, dac., by which the saws may be conveniently adjusted to and from each other, and secured quickly and rigidly in the position in relation to each other desired, as will be hereinafter more particularlydescribed and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure l is a perspective view of a pair of saws of the character' named mounted on the end of a mandrel, the outside collar and nut being omitted and the saws being adj usted a considerable distance apart for the purpose of showing the parts which constitute the invention more clearly; and Fig. 2, acentral longitudinal section through the same with the collar and nut in place.

In said drawings the portions marked A represent the mandrel; B B, the saws; C C', the bases on which said saws are supported, and D the collars for clamping the saws on the mandrel.

The mandrel A is or may be any ordinary saw-mandrel adapted for the purpose.

The saws B B are or may be any saws adapted for the purpose, and are securely riveted to their respective bases.

The base C of the saw B consists of a disk somewhat larger than the collar provided with a central perforation adapted to fit closely upon the mandrel, around which is formed an inwardly-proj ecting annular lian ge C, exteriorly screwthreaded, on which is mounted a nut o', formed with a milled outer edge for convenience in operating it by hand, and having a straight outer face.

The base C of the saw B consists of a disk corresponding in size to the other, formed with a cup-shaped center adapted to fit over the nut c and against its outer face, a central perforation being provided for the mandrel, and the opposite sides of the outwardly-extending part being preferably out away, as shown, to permit access to the nut for the purpose of operating it without the necessity of removing the saw.

The collars D are secured upon the mandrel in the usual or any desired manner, and by means of the nut D are made to clamp the bases of the saws firmly between them and hold them to the mandrel, as will be readily understood.

The operation of my said invention is as follows: The saws being mounted upon the mandrel, as shown, and it being desirable to adjust them nearer to or farther' from each other, the nut c is turned until the space between the saws is of just the width desired, and they are then securely clamped in this position by means of the collars in the wellknown manner. By this arrangement any adjustment of the saws desired can be quickly and conveniently secured.

I-Iaving thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination, with a saw or cutterhead, of a base for supporting one of the saws or cutters having an external screwthreaded flange, a nut mounted on said screw-threaded ange, and a base for supporting the other saw or cutter adapted to iit upon and bear against said nut, substantially as set forth.

2. The combination of the mandrel, the saws, the base C, formed with a screwthreaded collar c, the nut c', mounted thereon, and the base C2, formed cup-shaped to lit over and against said nut, opposite sides thereof being cut away to permit said nut to be operated without removing said base, substantially as set forth.

3. The combination of thc mandrel A, the saw B, securely riveted to the base C, said base C provided with the external screwthreaded flange c, the nut o', mounted there- In Witness whereof I have hereunto sei; my on, a saw B', securely riveted to the hase C', hand and Seal, at Indianapolis, Indiana, this said base C formed to fit around and against 230th dayv of October, A. D. 1889.

said nut, and the Collars D, arranged to bear XVILLIAM MILLARD. [L against said bases C and C to securely clamp XVunesses: lehem iu any position desired, substantially E. \V. BRADFORD,

as set forth.

J. WALSH. 

